IRGAFOS P-EPQ

• CAS: 119345-01-6
• Catalog Number: ACM119345016-1
• Category: Main Products
• Molecular Weight: 1035.4
• Molecular Formula: C68H92O4P2
• Synonyms: Ethylethyl)phenol;irganoxxp,anitoxidantprocessingstabilizerblends
• Melting Point: 93-99 °C
• Appearance: White powder
• Physical State: Off-white powder

Case Study

The Phenol/Phosphite Antioxidant Formulation in the Thermal Stabilization of Metallocene LLDPE

Allen, Norman S., et al. Polymer Degradation and Stability, 2018, 152, 208-217.

This work compared the optimization effects of several phenol/phosphite antioxidant combination formulations on the thermal stability of metallocene polyethylene (mLLDPE). The phenolic antioxidants involved include Irganox 1010 and Irganox 1076, and the phosphite antioxidants include Irgafos 168, Irgafos P-EPQ, Adekastab PEP-8, Adekastab PEP-36, Adekastab PEP-24G and Adekastab HP-10.
Sample preparation and experimental results related to Irgafos P-EPQ
· Polymer film preparation: All additives were mixed with dichloromethane and then evaporated. The mixture was pressed at 160 °C to create films with a thickness ranging from 150 to 250 mm. The films were cut into small pieces and placed on aluminum holders for thermo-oxidative degradation.
· Hydrolytic stability: The hydrolytic stability of the phosphites was analyzed. Adekastab PEP-36 was found to be twice as hydrolytically stable as Irgafos P-EPQ, which is considered to be hydrolytically unstable. Adekastab PEP-24G and Adekastab PEP-8 were both less hydrolytically stable than Irgafos P-EPQ.
· Oven ageing: The results show the ten best packages that exhibit high thermal-oxidative long-term stability. 4:1 Irganox 1010: Irgafos P-EPQ shows the best performance.
· However, only three packages fulfilled all the required stability conditions considering the optimal ratio of melt stability, long-term stability and discoloration. They are 4:1 Irganox 1010:Adekastab PEP-36, 4:1 Irganox 1010:Irgafos 168, and 4:1 Irganox 1010:Adekastab HP-10.

Performance Evaluation of Antioxidants in Asphalt Binders Including IRGAFOS P-EPQ

Apeagyei, Alex K. Construction and Building Materials, 2011, 25(1), 47-53.

To study the effect of antioxidants on reducing age hardening of asphalt binders, several additives were evaluated, including vitamin E, Irganox 1010, Irgafos P-EPQ, carbon black, slaked lime, and DLTDP/furfural. Results showed that antioxidant-treated adhesives exhibited improved performance at both high and low pavement temperatures.
Performance evaluation of IRGAFOS P-EPQ
· The aging index can be calculated using any asphalt physical property that changes over time. In this case, the screening of antioxidants was based on the G*/sin δ aging index instead of the viscosity-based aging index.
· Irgafos P-EPQ is a well-known synergist to primary antioxidants, enhancing thermo-oxidative stability when used together. It also has a low melting point within the 75-95 °C range.
· As Irgafos P-EPQ is considered a secondary antioxidant, studies suggest that a synergistic effect can be achieved when combined with other antioxidants. Testing the effect of Irgafos P-EPQ alone, a 3% additive level by weight of the base binder resulted in a 15% reduction in aging. When combined with other additives, there was some improvement over the performance of Irgafos P-EPQ alone.

Characterization of Irgafos P-EPQ by LC coupled to FT-IR Spectroscopy

Bruheim, Inge, et al. Journal of High Resolution Chromatography 23.9 (2000): 525-530.

Instrument coupling was used for the characterization of the antioxidant Irgafos P-EPQ. Temperature-programmed packed capillary liquid chromatography has been coupled offline to a FT-IR spectrometer using a commercially available interface and a rebuilt pneumatic nebulizer to handle low flow rates at high temperatures. The modified interface showed excellent performance in non-aqueous reversed-phase separations of polymeric additives, resulting in constructed Gram-Schmidt chromatograms comparable to those obtained using UV detection. The spray from the in-house built nebulizer was not affected by changes in column effluent temperature, allowing successful separation using temperature-programmed gradients. Using the polymeric antioxidant as a model compound, the relative standard deviation of the peak height was 4.4% (n = 5) and the detection mass limit was approximately 40 ng.
Irgafos P-EPQ is a polymeric additive containing multiple major components. Several of these components are isomers with the same molecular weight, making IR detection preferable to MS for structural elucidation. A temperature programmed packed capillary LC-FT-IR separation of Irgafos P-EPQ is shown. Interpretation of the IR spectrum of peak 5 indicates that this compound is 4,49-PEPQ, which is the main component of the additive. Aromatic C-H stretching absorption lines are found at 3 030 cm(w), 1 600 cm(w) and 1 495 cm(m). Unfortunately, there are too many lines below 900 cm, making the identification of the benzene C-H deformation lines difficult. The 2960 cm(s) and 2870 cm(s) lines confirm the presence of tert-butyl groups. A P-O-phenyl bond is also present (1188 cm , (m)). Peak 1 is likely "mono-PEPQ" because the IR spectrum shows the same absorption frequencies as 4,49-PEPQ, thus indicating the presence of the same functional groups.

Study on the Effect of Irgafos P-EPQ on Polyetheretherketone/Polyetherimide Blends

Ramani, R., and S. Alam. High Performance Polymers 26.3 (2014): 347-356.

The effect of Irgafos P-EPQ, an organophosphite antioxidant, on the glass transition and viscoelastic behavior of optimized polyetheretherketone (PEEK)/polyetherimide (PEI; PEEK/PEI: 50/50) blends has been reported. For this purpose, Irgafos P-EPQ was added to PEEK/PEI blends in different ratios and investigated by quasi-isothermal modulated differential scanning calorimetry (Qi-MDSC) and dynamic mechanical thermal analysis (DMTA) methods. The Qi-MDSC results clearly show that the glass transition temperature of the blends decreases significantly when P-EPQ is added up to 1 wt%. DMTA measurements show a decrease in the tan peak temperature after the addition of the antioxidant, consistent with the calorimetric results. The displacement factors obtained using the time-temperature superposition of the DMTA data exhibited Williams-Landel-Ferry behavior and the free volume fraction of the blends increased with increasing antioxidant addition (up to 1 wt%). The "master curve" of the storage modulus predicts high modulus for blends containing 1 wt% antioxidant, revealing its suitability for high-impact applications.
Blending was performed by using equal proportions of PEEK and PEI and adding different proportions of Irgafos P-EPQ (0.0, 0.5, 1.0, 1.5, and 2.0 wt% of the blend). These blends are designated as PP0.0 ,PP0.5 , PP1.0 , PP1.5, and PP2.0 , where the subscripts represent the weight % of Irgafos P-EPQ in the blend. The blends were subsequently injection molded at a temperature close to 360°C into rectangular rods of 10×45×3 mm dimensions. Qi-MDSC experiments were performed using a DSC Q200. The instrument was calibrated using indium (temperature) and sapphire (heat capacity) standards; measurements were performed under a nitrogen atmosphere (flow rate 1/4 50 mL/min). The instrument was equipped with a refrigerated cooling system with a temperature accuracy of +0.1°C. Approximately 5 mg of sample was weighed and sealed in an aluminum sample pan and heated above its melting temperature for 5 min in the conventional manner and then cooled to eliminate the thermal history.

Custom Q&A

What is the molecular formula of IRGAFOS P-EPQ?

The molecular formula of IRGAFOS P-EPQ is C68H92O4P2.

What are the synonyms for IRGAFOS P-EPQ?

The synonyms for IRGAFOS P-EPQ include Tetrakis(2,4-di-tert-butylphenyl) [1,1'-biphenyl]-4,4'-diylbis(phosphonite) and 38613-77-3.

What is the molecular weight of IRGAFOS P-EPQ?

The molecular weight of IRGAFOS P-EPQ is 1035.4 g/mol.

When was IRGAFOS P-EPQ created and modified?

IRGAFOS P-EPQ was created on August 8, 2005, and modified on October 21, 2023.

What is the IUPAC name of IRGAFOS P-EPQ?

The IUPAC name of IRGAFOS P-EPQ is [4-[4-bis(2,4-ditert-butylphenoxy)phosphanylphenyl]phenyl]-bis(2,4-ditert-butylphenoxy)phosphane.

What is the InChI of IRGAFOS P-EPQ?

The InChI of IRGAFOS P-EPQ is InChI=1S/C68H92O4P2/c1-61(2,3)47-29-37-57(53(41-47)65(13,14)15)69-73(70-58-38-30-48(62(4,5)6)42-54(58)66(16,17)18)51-33-25-45(26-34-51)46-27-35-52(36-28-46)74(71-59-39-31-49(63(7,8)9)43-55(59)67(19,20)21)72-60-40-32-50(64(10,11)12)44-56(60)68(22,23)24/h25-44H,1-24H3.

What is the InChIKey of IRGAFOS P-EPQ?

The InChIKey of IRGAFOS P-EPQ is BEIOEBMXPVYLRY-UHFFFAOYSA-N.

What is the canonical SMILES of IRGAFOS P-EPQ?

The canonical SMILES of IRGAFOS P-EPQ is CC(C)(C)C1=CC(=C(C=C1)OP(C2=CC=C(C=C2)C3=CC=C(C=C3)P(OC4=C(C=C(C=C4)C(C)(C)C)C(C)(C)C)OC5=C(C=C(C=C5)C(C)(C)C)C(C)(C)C)OC6=C(C=C(C=C6)C(C)(C)C)C(C)(C)C)C(C)(C)C.

What is the CAS number of IRGAFOS P-EPQ?

The CAS number of IRGAFOS P-EPQ is 38613-77-3.

What are the other identifiers for IRGAFOS P-EPQ?

The other identifiers for IRGAFOS P-EPQ include 153453-64-6, 113041-61-5, 144280-21-7, 2278203-87-3, and DTXSID10894018.